Hydrogen production from biorenewables over nonnoble metal catalysts

CATL 37

Hua Song, song.216@osu.edu, Lingzhi Zhang, zhang.464@osu.edu, and Umit S. Ozkan, ozkan@chbmeng.ohio-state.edu. Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 West 19th Ave., Columbus, OH 43210
In this study, the effects of support, metal loading, synthesis parameters, promoters, as well as reaction conditions have been investigated for steam reforming of bio-derived liquids over Co-based catalysts. In addition to these effects, the reaction networks and catalytic active sites have been evaluated through steady state reaction and characterization studies by employing versatile characterization techniques such as Temperature Programmed Reduction (TPR), Temperature Programmed Desorption (TPD), Temperature Programmed Oxidation (TPO), N2 Physisorption, Chemisorption, X-Ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), Laser Raman Spectroscopy (LRS), Thermogravimetric Analysis-Differential Scanning Calorimetry (TGA-DSC), Isotopic Labeling, and Transmission Electron Microscopy (TEM). The relationship between surface and structural properties and activity has been established to facilitate rational design of catalyst systems. H2 yields over 90% have been achieved at temperatures below 450°C. In addition, the deactivation mechanism has been explored and catalysts with modified formulations have been developed to achieve long-term stability while keeping high activity.